Variable bandwidth tunable silicon duplexer
US7825745B1 · kind B1 · utility
33Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2007 |
| Grant date | Nov 2, 2010 |
| Priority date | — |
| Expiry date | Aug 25, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H7/463
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A tunable duplexer using voltage-controlled varactors is presented. The center frequency, the pass band, and the stop band are each tunable to meet system requirements. A calibration circuit driving digital to analog converters produces the necessary voltages used in the resonant circuits. The tunable duplexer can be fabricated on a single silicon chip. On-chip transformers can be used to reduce the voltage level of signals in the filters to improve the linearity of the duplexer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.